/**
 * list.h
 **/

#ifndef LIST_H
#define LIST_H

/**
 * Define a structure for linked list elements
 **/

typedef struct ListElmt_ {
   
    void *data;
    struct ListElmt_ *next;

} ListElmt;

/**
 * Define a structure for linked lists
 **/

typedef struct List_ {
    
    int size;
    
    int (*match)(const void *key1, const void *key2);
    void (*destroy)(void *data);

    ListElmt *head;
    ListElmt *tail;

} List;

/**
 * Public Interface
 **/

void list_init(List *list, void (*destroy)(void *data));

void list_destroy(List *list);

int list_ins_next(List *list, ListElmt *element, const void *data);

int list_rem_next(List *list, ListElmt *element, void **data);

#define list_size(list) ((list)->size)

#define list_head(list) ((list)->head)

#define list_tail(list) ((list)->tail)

#define list_is_head(list, element) ((element) == (list)->head ? 1 : 0)

#define list_is_tail(list, elememt) ((element) == (list)->tail ? 1 : 0)

#define list_data(element) ((element)->data)

#define list_next(element) ((element)->next)

#endif